Montgomery County, Illinois | |
|---|---|
_(3637358510).jpg) Montgomery County Courthouse, Hillsboro | |
 Location within the U.S. state ofIllinois | |
 Illinois's location within theU.S. | |
| Coordinates:39°14′N89°29′W / 39.23°N 89.48°W /39.23; -89.48 | |
| Country |  United States |
| State |  Illinois |
| Founded | 1821 |
| Named after | Richard Montgomery |
| Seat | Hillsboro |
| Largest city | Litchfield |
| Area | |
• Total | 710 sq mi (1,800 km2) |
| • Land | 704 sq mi (1,820 km2) |
| • Water | 6.0 sq mi (16 km2) 0.8% |
| Population (2020) | |
• Total | 28,288 |
• Estimate (2024) | 27,615 [1] |
| • Density | 40.2/sq mi (15.5/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 15th |
| Website | montgomerycountyil |
Montgomery County is acounty located in theU.S. state ofIllinois. According to the2020 United States census, it had a population of 28,288.[2] Itscounty seat isHillsboro.[3][4]
Montgomery County was formed in 1821 out ofBond andMadison counties. It was named in honor ofRichard Montgomery, anAmerican Revolutionary War general killed in 1775 while attempting to captureQuebec City,Canada.[5] Perrin's 1882History of Montgomery County relates that the county was named in honor of Gen. Montgomery, but goes on to say that "others are dubious as to whence it received its name."
According to theU.S. Census Bureau, the county has a total area of 710 square miles (1,800 km2), of which 704 square miles (1,820 km2) is land and 6.0 square miles (16 km2) (0.8%) is water.[6]
| Hillsboro, Illinois | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate chart (explanation) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
In recent years, average temperatures in the county seat of Hillsboro have ranged from a low of 21 °F (−6 °C) in January to a high of 91 °F (33 °C) in July, although a record low of −22 °F (−30 °C) was recorded in February 1905 and a record high of 114 °F (46 °C) was recorded in July 1954. Average monthly precipitation ranged from 2.00 inches (51 mm) in February to 4.31 inches (109 mm) in May.[7]
Interstate 55
Illinois Route 16
Illinois Route 48
Illinois Route 108
Illinois Route 127
Illinois Route 185Litchfield Municipal Airport is located in Montgomery County, two nautical miles (3.7 km) southwest of thecentral business district ofLitchfield, Illinois.
| Census | Pop. | Note | %± |
|---|---|---|---|
| 1830 | 2,953 | — | |
| 1840 | 4,490 | 52.0% | |
| 1850 | 6,277 | 39.8% | |
| 1860 | 13,979 | 122.7% | |
| 1870 | 25,314 | 81.1% | |
| 1880 | 28,078 | 10.9% | |
| 1890 | 30,003 | 6.9% | |
| 1900 | 30,836 | 2.8% | |
| 1910 | 35,311 | 14.5% | |
| 1920 | 41,403 | 17.3% | |
| 1930 | 35,278 | −14.8% | |
| 1940 | 34,499 | −2.2% | |
| 1950 | 32,460 | −5.9% | |
| 1960 | 31,244 | −3.7% | |
| 1970 | 30,260 | −3.1% | |
| 1980 | 31,686 | 4.7% | |
| 1990 | 30,728 | −3.0% | |
| 2000 | 30,652 | −0.2% | |
| 2010 | 30,104 | −1.8% | |
| 2020 | 28,288 | −6.0% | |
| 2024 (est.) | 27,615 | [8] | −2.4% |
| U.S. Decennial Census[9] 1790-1960[10] 1900-1990[11] 1990-2000[12] 2010[13] | |||
| Race / Ethnicity(NH = Non-Hispanic) | Pop 1980[14] | Pop 1990[15] | Pop 2000[16] | Pop 2010[17] | Pop 2020[18] | % 1980 | % 1990 | % 2000 | % 2010 | % 2020 |
|---|---|---|---|---|---|---|---|---|---|---|
| White alone (NH) | 21,665 | 20,089 | 28,928 | 28,334 | 25,709 | 97.74% | 96.15% | 94.38% | 94.12% | 90.88% |
| Black or African American alone (NH) | 297 | 581 | 1,141 | 949 | 916 | 1.34% | 2.78% | 3.72% | 3.15% | 3.24% |
| Native American orAlaska Native alone (NH) | 37 | 37 | 59 | 45 | 49 | 0.17% | 0.18% | 0.19% | 0.15% | 0.17% |
| Asian alone (NH) | 26 | 31 | 67 | 111 | 131 | 0.12% | 0.15% | 0.22% | 0.37% | 0.46% |
| Native Hawaiian orPacific Islander alone (NH) | x[19] | x[20] | 5 | 11 | 7 | x | x | 0.02% | 0.04% | 0.02% |
| Other race alone (NH) | 9 | 1 | 4 | 10 | 26 | 0.04% | 0.00% | 0.01% | 0.03% | 0.09% |
| Mixed race or Multiracial (NH) | x[21] | x[22] | 122 | 185 | 863 | x | x | 0.40% | 0.61% | 3.05% |
| Hispanic or Latino (any race) | 133 | 154 | 326 | 459 | 587 | 0.60% | 0.74% | 1.06% | 1.52% | 2.08% |
| Total | 22,167 | 20,893 | 30,652 | 30,104 | 28,288 | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% |
As of the2010 United States census, there were 30,104 people, 11,652 households, and 7,806 families living in the county.[23] The population density was 42.8 inhabitants per square mile (16.5/km2). There were 13,080 housing units at an average density of 18.6 per square mile (7.2/km2).[6] The racial makeup of the county was 95.1% white, 3.2% black or African American, 0.4% Asian, 0.2% American Indian, 0.5% from other races, and 0.7% from two or more races. Those of Hispanic or Latino origin made up 1.5% of the population.[23] In terms of ancestry, 27.8% wereGerman, 11.2% wereIrish, 10.1% wereEnglish, and 9.8% wereAmerican.[24]
Of the 11,652 households, 29.8% had children under the age of 18 living with them, 51.7% were married couples living together, 10.2% had a female householder with no husband present, 33.0% were non-families, and 28.4% of all households were made up of individuals. The average household size was 2.38 and the average family size was 2.87. The median age was 41.9 years.[23]
The median income for a household in the county was $40,864 and the median income for a family was $56,945. Males had a median income of $40,749 versus $29,426 for females. The per capita income for the county was $21,700. About 10.9% of families and 14.0% of the population were below thepoverty line, including 22.7% of those under age 18 and 7.4% of those age 65 or over.[25]
| Year | Republican | Democratic | Third party(ies) | |||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| 1892 | 2,935 | 41.01% | 3,707 | 51.80% | 515 | 7.20% |
| 1896 | 3,622 | 46.02% | 4,117 | 52.31% | 132 | 1.68% |
| 1900 | 3,583 | 45.43% | 4,078 | 51.71% | 225 | 2.85% |
| 1904 | 3,489 | 47.98% | 3,181 | 43.74% | 602 | 8.28% |
| 1908 | 3,782 | 45.64% | 3,909 | 47.17% | 596 | 7.19% |
| 1912 | 1,476 | 18.20% | 3,705 | 45.69% | 2,928 | 36.11% |
| 1916 | 7,065 | 44.65% | 7,903 | 49.94% | 856 | 5.41% |
| 1920 | 7,429 | 52.92% | 4,756 | 33.88% | 1,854 | 13.21% |
| 1924 | 8,022 | 47.26% | 5,622 | 33.12% | 3,331 | 19.62% |
| 1928 | 8,999 | 54.29% | 7,392 | 44.60% | 184 | 1.11% |
| 1932 | 5,945 | 34.71% | 10,456 | 61.05% | 725 | 4.23% |
| 1936 | 8,140 | 42.92% | 10,132 | 53.43% | 692 | 3.65% |
| 1940 | 10,497 | 51.65% | 9,654 | 47.50% | 174 | 0.86% |
| 1944 | 8,989 | 52.74% | 7,855 | 46.08% | 201 | 1.18% |
| 1948 | 8,348 | 50.73% | 7,902 | 48.02% | 205 | 1.25% |
| 1952 | 10,014 | 54.95% | 8,195 | 44.97% | 16 | 0.09% |
| 1956 | 9,945 | 56.36% | 7,692 | 43.59% | 8 | 0.05% |
| 1960 | 9,178 | 50.97% | 8,815 | 48.95% | 14 | 0.08% |
| 1964 | 6,425 | 37.78% | 10,581 | 62.22% | 0 | 0.00% |
| 1968 | 7,547 | 46.19% | 7,318 | 44.79% | 1,474 | 9.02% |
| 1972 | 9,025 | 56.71% | 6,858 | 43.10% | 30 | 0.19% |
| 1976 | 7,379 | 46.56% | 8,322 | 52.51% | 147 | 0.93% |
| 1980 | 8,947 | 58.04% | 5,721 | 37.11% | 747 | 4.85% |
| 1984 | 8,191 | 56.08% | 6,360 | 43.55% | 54 | 0.37% |
| 1988 | 6,388 | 46.43% | 7,293 | 53.01% | 78 | 0.57% |
| 1992 | 4,407 | 29.70% | 7,424 | 50.04% | 3,006 | 20.26% |
| 1996 | 4,770 | 37.76% | 6,338 | 50.18% | 1,523 | 12.06% |
| 2000 | 6,226 | 47.55% | 6,542 | 49.97% | 325 | 2.48% |
| 2004 | 6,851 | 52.99% | 5,979 | 46.24% | 100 | 0.77% |
| 2008 | 6,150 | 47.64% | 6,491 | 50.28% | 268 | 2.08% |
| 2012 | 6,776 | 55.60% | 5,058 | 41.50% | 354 | 2.90% |
| 2016 | 8,630 | 66.50% | 3,504 | 27.00% | 844 | 6.50% |
| 2020 | 9,544 | 69.36% | 3,905 | 28.38% | 312 | 2.27% |
| 2024 | 9,378 | 70.80% | 3,573 | 26.97% | 295 | 2.23% |
Places adjacent to Montgomery County, Illinois | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||||
Municipalities and communities ofMontgomery County, Illinois,United States | ||
|---|---|---|
| Cities |  | |
| Villages | ||
| Townships | ||
| Unincorporated communities | ||
| Footnotes | ‡This populated place also has portions in an adjacent county or counties | |
| International | |
|---|---|
| National | |
| Geographic | |
| Other | |
